#ifndef _IDE_H
#define _IDE_H
/*
 *  linux/include/linux/ide.h
 *
 *  Copyright (C) 1994-2002  Linus Torvalds & authors
 */

#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/ata.h>
#include <linux/blkdev.h>
#include <linux/proc_fs.h>
#include <linux/interrupt.h>
#include <linux/bitops.h>
#include <linux/bio.h>
#include <linux/device.h>
#include <linux/pci.h>
#include <linux/completion.h>
#include <linux/pm.h>
#ifdef CONFIG_BLK_DEV_IDEACPI
#include <acpi/acpi.h>
#endif
#include <asm/byteorder.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/mutex.h>

#if defined(CONFIG_CRIS) || defined(CONFIG_FRV)
#define SUPPORT_VLB_SYNC 0
#else
#define SUPPORT_VLB_SYNC 1
#endif

/*
 * Probably not wise to fiddle with these
 */
#define IDE_DEFAULT_MAX_FAILURES	1
#define ERROR_MAX	8	/* Max read/write errors per sector */
#define ERROR_RESET	3	/* Reset controller every 4th retry */
#define ERROR_RECAL	1	/* Recalibrate every 2nd retry */

/*
 * Definitions for accessing IDE controller registers
 */
#define IDE_NR_PORTS		(10)

struct ide_io_ports {
	unsigned long data_addr;

	union {
		unsigned long error_addr;	/*   read:  error */
		unsigned long feature_addr;	/*  write: feature */
	};

	unsigned long nsect_addr;
	unsigned long lbal_addr;
	unsigned long lbam_addr;
	unsigned long lbah_addr;

	unsigned long device_addr;

	union {
		unsigned long status_addr;	/*  read: status   */
		unsigned long command_addr;	/* write: command */
	};

	unsigned long ctl_addr;

	unsigned long irq_addr;
};

#define OK_STAT(stat,good,bad)	(((stat)&((good)|(bad)))==(good))

#define BAD_R_STAT	(ATA_BUSY | ATA_ERR)
#define BAD_W_STAT	(BAD_R_STAT | ATA_DF)
#define BAD_STAT	(BAD_R_STAT | ATA_DRQ)
#define DRIVE_READY	(ATA_DRDY | ATA_DSC)

#define BAD_CRC		(ATA_ABORTED | ATA_ICRC)

#define SATA_NR_PORTS		(3)	/* 16 possible ?? */

#define SATA_STATUS_OFFSET	(0)
#define SATA_ERROR_OFFSET	(1)
#define SATA_CONTROL_OFFSET	(2)

/*
 * Our Physical Region Descriptor (PRD) table should be large enough
 * to handle the biggest I/O request we are likely to see.  Since requests
 * can have no more than 256 sectors, and since the typical blocksize is
 * two or more sectors, we could get by with a limit of 128 entries here for
 * the usual worst case.  Most requests seem to include some contiguous blocks,
 * further reducing the number of table entries required.
 *
 * The driver reverts to PIO mode for individual requests that exceed
 * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
 * 100% of all crazy scenarios here is not necessary.
 *
 * As it turns out though, we must allocate a full 4KB page for this,
 * so the two PRD tables (ide0 & ide1) will each get half of that,
 * allowing each to have about 256 entries (8 bytes each) from this.
 */
#define PRD_BYTES       8
#define PRD_ENTRIES	256

/*
 * Some more useful definitions
 */
#define PARTN_BITS	6	/* number of minor dev bits for partitions */
#define MAX_DRIVES	2	/* per interface; 2 assumed by lots of code */
#define SECTOR_SIZE	512

/*
 * Timeouts for various operations:
 */
enum {
	/* spec allows up to 20ms */
	WAIT_DRQ = HZ / 10,	/* 100ms */
	/* some laptops are very slow */
	WAIT_READY = 5 * HZ,	/* 5s */
	/* should be less than 3ms (?), if all ATAPI CD is closed at boot */
	WAIT_PIDENTIFY = 10 * HZ,	/* 10s */
	/* worst case when spinning up */
	WAIT_WORSTCASE = 30 * HZ,	/* 30s */
	/* maximum wait for an IRQ to happen */
	WAIT_CMD = 10 * HZ,	/* 10s */
	/* Some drives require a longer IRQ timeout. */
	WAIT_FLOPPY_CMD = 50 * HZ,	/* 50s */
	/*
	 * Some drives (for example, Seagate STT3401A Travan) require a very
	 * long timeout, because they don't return an interrupt or clear their
	 * BSY bit until after the command completes (even retension commands).
	 */
	WAIT_TAPE_CMD = 900 * HZ,	/* 900s */
	/* minimum sleep time */
	WAIT_MIN_SLEEP = HZ / 50,	/* 20ms */
};

/*
 * Op codes for special requests to be handled by ide_special_rq().
 * Values should be in the range of 0x20 to 0x3f.
 */
#define REQ_DRIVE_RESET		0x20
#define REQ_DEVSET_EXEC		0x21
#define REQ_PARK_HEADS		0x22
#define REQ_UNPARK_HEADS	0x23

/*
 * Check for an interrupt and acknowledge the interrupt status
 */
struct hwif_s;
typedef int (ide_ack_intr_t) (struct hwif_s *);

/*
 * hwif_chipset_t is used to keep track of the specific hardware
 * chipset used by each IDE interface, if known.
 */
enum { ide_unknown, ide_generic, ide_pci,
	ide_cmd640, ide_dtc2278, ide_ali14xx,
	ide_qd65xx, ide_umc8672, ide_ht6560b,
	ide_4drives, ide_pmac, ide_acorn,
	ide_au1xxx, ide_palm3710
};

typedef u8 hwif_chipset_t;

/*
 * Structure to hold all information about the location of this port
 */
typedef struct hw_regs_s {
	union {
		struct ide_io_ports io_ports;
		unsigned long io_ports_array[IDE_NR_PORTS];
	};

	int irq;		/* our irq number */
	ide_ack_intr_t *ack_intr;	/* acknowledge interrupt */
	hwif_chipset_t chipset;
	struct device *dev, *parent;
	unsigned long config;
} hw_regs_t;

static inline void ide_std_init_ports(hw_regs_t * hw,
				      unsigned long io_addr,
				      unsigned long ctl_addr)
{
	unsigned int i;

	for (i = 0; i <= 7; i++)
		hw->io_ports_array[i] = io_addr++;

	hw->io_ports.ctl_addr = ctl_addr;
}

/* for IDE PCI controllers in legacy mode, temporary */
static inline int __ide_default_irq(unsigned long base)
{
	switch (base) {
#ifdef CONFIG_IA64
	case 0x1f0:
		return isa_irq_to_vector(14);
	case 0x170:
		return isa_irq_to_vector(15);
#else
	case 0x1f0:
		return 14;
	case 0x170:
		return 15;
#endif
	}
	return 0;
}

#if defined(CONFIG_ARM) || defined(CONFIG_FRV) || defined(CONFIG_M68K) || \
    defined(CONFIG_MIPS) || defined(CONFIG_MN10300) || defined(CONFIG_PARISC) \
    || defined(CONFIG_PPC) || defined(CONFIG_SPARC) || defined(CONFIG_SPARC64)
#include <asm/ide.h>
#else
#include <asm-generic/ide_iops.h>
#endif

#define MAX_HWIFS	10

/* Currently only m68k, apus and m8xx need it */
#ifndef IDE_ARCH_ACK_INTR
#define ide_ack_intr(hwif) (1)
#endif

/* Currently only Atari needs it */
#ifndef IDE_ARCH_LOCK
#define ide_release_lock()			do {} while (0)
#define ide_get_lock(hdlr, data)		do {} while (0)
#endif /* IDE_ARCH_LOCK */

/*
 * Now for the data we need to maintain per-drive:  ide_drive_t
 */

#define ide_scsi	0x21
#define ide_disk	0x20
#define ide_optical	0x7
#define ide_cdrom	0x5
#define ide_tape	0x1
#define ide_floppy	0x0

/*
 * Special Driver Flags
 *
 * set_geometry	: respecify drive geometry
 * recalibrate	: seek to cyl 0
 * set_multmode	: set multmode count
 * reserved	: unused
 */
typedef union {
	unsigned all:8;
	struct {
		unsigned set_geometry:1;
		unsigned recalibrate:1;
		unsigned set_multmode:1;
		unsigned reserved:5;
	} b;
} special_t;

/*
 * Status returned from various ide_ functions
 */
typedef enum {
	ide_stopped,		/* no drive operation was started */
	ide_started,		/* a drive operation was started, handler was set */
} ide_startstop_t;

enum {
	IDE_TFLAG_LBA48 = (1 << 0),
	IDE_TFLAG_FLAGGED = (1 << 2),
	IDE_TFLAG_OUT_DATA = (1 << 3),
	IDE_TFLAG_OUT_HOB_FEATURE = (1 << 4),
	IDE_TFLAG_OUT_HOB_NSECT = (1 << 5),
	IDE_TFLAG_OUT_HOB_LBAL = (1 << 6),
	IDE_TFLAG_OUT_HOB_LBAM = (1 << 7),
	IDE_TFLAG_OUT_HOB_LBAH = (1 << 8),
	IDE_TFLAG_OUT_HOB = IDE_TFLAG_OUT_HOB_FEATURE |
	    IDE_TFLAG_OUT_HOB_NSECT |
	    IDE_TFLAG_OUT_HOB_LBAL |
	    IDE_TFLAG_OUT_HOB_LBAM | IDE_TFLAG_OUT_HOB_LBAH,
	IDE_TFLAG_OUT_FEATURE = (1 << 9),
	IDE_TFLAG_OUT_NSECT = (1 << 10),
	IDE_TFLAG_OUT_LBAL = (1 << 11),
	IDE_TFLAG_OUT_LBAM = (1 << 12),
	IDE_TFLAG_OUT_LBAH = (1 << 13),
	IDE_TFLAG_OUT_TF = IDE_TFLAG_OUT_FEATURE |
	    IDE_TFLAG_OUT_NSECT |
	    IDE_TFLAG_OUT_LBAL | IDE_TFLAG_OUT_LBAM | IDE_TFLAG_OUT_LBAH,
	IDE_TFLAG_OUT_DEVICE = (1 << 14),
	IDE_TFLAG_WRITE = (1 << 15),
	IDE_TFLAG_FLAGGED_SET_IN_FLAGS = (1 << 16),
	IDE_TFLAG_IN_DATA = (1 << 17),
	IDE_TFLAG_CUSTOM_HANDLER = (1 << 18),
	IDE_TFLAG_DMA_PIO_FALLBACK = (1 << 19),
	IDE_TFLAG_IN_HOB_FEATURE = (1 << 20),
	IDE_TFLAG_IN_HOB_NSECT = (1 << 21),
	IDE_TFLAG_IN_HOB_LBAL = (1 << 22),
	IDE_TFLAG_IN_HOB_LBAM = (1 << 23),
	IDE_TFLAG_IN_HOB_LBAH = (1 << 24),
	IDE_TFLAG_IN_HOB_LBA = IDE_TFLAG_IN_HOB_LBAL |
	    IDE_TFLAG_IN_HOB_LBAM | IDE_TFLAG_IN_HOB_LBAH,
	IDE_TFLAG_IN_HOB = IDE_TFLAG_IN_HOB_FEATURE |
	    IDE_TFLAG_IN_HOB_NSECT | IDE_TFLAG_IN_HOB_LBA,
	IDE_TFLAG_IN_FEATURE = (1 << 1),
	IDE_TFLAG_IN_NSECT = (1 << 25),
	IDE_TFLAG_IN_LBAL = (1 << 26),
	IDE_TFLAG_IN_LBAM = (1 << 27),
	IDE_TFLAG_IN_LBAH = (1 << 28),
	IDE_TFLAG_IN_LBA = IDE_TFLAG_IN_LBAL |
	    IDE_TFLAG_IN_LBAM | IDE_TFLAG_IN_LBAH,
	IDE_TFLAG_IN_TF = IDE_TFLAG_IN_NSECT | IDE_TFLAG_IN_LBA,
	IDE_TFLAG_IN_DEVICE = (1 << 29),
	IDE_TFLAG_HOB = IDE_TFLAG_OUT_HOB | IDE_TFLAG_IN_HOB,
	IDE_TFLAG_TF = IDE_TFLAG_OUT_TF | IDE_TFLAG_IN_TF,
	IDE_TFLAG_DEVICE = IDE_TFLAG_OUT_DEVICE | IDE_TFLAG_IN_DEVICE,
	/* force 16-bit I/O operations */
	IDE_TFLAG_IO_16BIT = (1 << 30),
	/* ide_task_t was allocated using kmalloc() */
	IDE_TFLAG_DYN = (1 << 31),
};

struct ide_taskfile {
	u8 hob_data;		/*  0: high data byte (for TASKFILE IOCTL) */

	u8 hob_feature;		/*  1-5: additional data to support LBA48 */
	u8 hob_nsect;
	u8 hob_lbal;
	u8 hob_lbam;
	u8 hob_lbah;

	u8 data;		/*  6: low data byte (for TASKFILE IOCTL) */

	union {			/*  7: */
		u8 error;	/*   read:  error */
		u8 feature;	/*  write: feature */
	};

	u8 nsect;		/*  8: number of sectors */
	u8 lbal;		/*  9: LBA low */
	u8 lbam;		/* 10: LBA mid */
	u8 lbah;		/* 11: LBA high */

	u8 device;		/* 12: device select */

	union {			/* 13: */
		u8 status;	/*  read: status   */
		u8 command;	/* write: command */
	};
};

typedef struct ide_task_s {
	union {
		struct ide_taskfile tf;
		u8 tf_array[14];
	};
	u32 tf_flags;
	int data_phase;
	struct request *rq;	/* copy of request */
	void *special;		/* valid_t generally */
} ide_task_t;

/* ATAPI packet command flags */
enum {
	/* set when an error is considered normal - no retry (ide-tape) */
	PC_FLAG_ABORT = (1 << 0),
	PC_FLAG_SUPPRESS_ERROR = (1 << 1),
	PC_FLAG_WAIT_FOR_DSC = (1 << 2),
	PC_FLAG_DMA_OK = (1 << 3),
	PC_FLAG_DMA_IN_PROGRESS = (1 << 4),
	PC_FLAG_DMA_ERROR = (1 << 5),
	PC_FLAG_WRITING = (1 << 6),
	/* command timed out */
	PC_FLAG_TIMEDOUT = (1 << 7),
};

/*
 * With each packet command, we allocate a buffer of IDE_PC_BUFFER_SIZE bytes.
 * This is used for several packet commands (not for READ/WRITE commands).
 */
#define IDE_PC_BUFFER_SIZE	256
#define ATAPI_WAIT_PC		(60 * HZ)

struct ide_atapi_pc {
	/* actual packet bytes */
	u8 c[12];
	/* incremented on each retry */
	int retries;
	int error;

	/* bytes to transfer */
	int req_xfer;
	/* bytes actually transferred */
	int xferred;

	/* data buffer */
	u8 *buf;
	/* current buffer position */
	u8 *cur_pos;
	int buf_size;
	/* missing/available data on the current buffer */
	int b_count;

	/* the corresponding request */
	struct request *rq;

	unsigned long flags;

	/*
	 * those are more or less driver-specific and some of them are subject
	 * to change/removal later.
	 */
	u8 pc_buf[IDE_PC_BUFFER_SIZE];

	/* idetape only */
	struct idetape_bh *bh;
	char *b_data;

	struct scatterlist *sg;
	unsigned int sg_cnt;

	unsigned long timeout;
};

struct ide_devset;
struct ide_driver;

#ifdef CONFIG_BLK_DEV_IDEACPI
struct ide_acpi_drive_link;
struct ide_acpi_hwif_link;
#endif

struct ide_drive_s;

struct ide_disk_ops {
	int (*check) (struct ide_drive_s *, const char *);
	int (*get_capacity) (struct ide_drive_s *);
	void (*setup) (struct ide_drive_s *);
	void (*flush) (struct ide_drive_s *);
	int (*init_media) (struct ide_drive_s *, struct gendisk *);
	int (*set_doorlock) (struct ide_drive_s *, struct gendisk *, int);
	 ide_startstop_t(*do_request) (struct ide_drive_s *, struct request *,
				       sector_t);
	int (*end_request) (struct ide_drive_s *, int, int);
	int (*ioctl) (struct ide_drive_s *, struct block_device *,
		      fmode_t, unsigned int, unsigned long);
};

/* ATAPI device flags */
enum {
	IDE_AFLAG_DRQ_INTERRUPT = (1 << 0),

	/* ide-cd */
	/* Drive cannot eject the disc. */
	IDE_AFLAG_NO_EJECT = (1 << 1),
	/* Drive is a pre ATAPI 1.2 drive. */
	IDE_AFLAG_PRE_ATAPI12 = (1 << 2),
	/* TOC addresses are in BCD. */
	IDE_AFLAG_TOCADDR_AS_BCD = (1 << 3),
	/* TOC track numbers are in BCD. */
	IDE_AFLAG_TOCTRACKS_AS_BCD = (1 << 4),
	/*
	 * Drive does not provide data in multiples of SECTOR_SIZE
	 * when more than one interrupt is needed.
	 */
	IDE_AFLAG_LIMIT_NFRAMES = (1 << 5),
	/* Saved TOC information is current. */
	IDE_AFLAG_TOC_VALID = (1 << 6),
	/* We think that the drive door is locked. */
	IDE_AFLAG_DOOR_LOCKED = (1 << 7),
	/* SET_CD_SPEED command is unsupported. */
	IDE_AFLAG_NO_SPEED_SELECT = (1 << 8),
	IDE_AFLAG_VERTOS_300_SSD = (1 << 9),
	IDE_AFLAG_VERTOS_600_ESD = (1 << 10),
	IDE_AFLAG_SANYO_3CD = (1 << 11),
	IDE_AFLAG_FULL_CAPS_PAGE = (1 << 12),
	IDE_AFLAG_PLAY_AUDIO_OK = (1 << 13),
	IDE_AFLAG_LE_SPEED_FIELDS = (1 << 14),

	/* ide-floppy */
	/* Avoid commands not supported in Clik drive */
	IDE_AFLAG_CLIK_DRIVE = (1 << 15),
	/* Requires BH algorithm for packets */
	IDE_AFLAG_ZIP_DRIVE = (1 << 16),
	/* Supports format progress report */
	IDE_AFLAG_SRFP = (1 << 17),

	/* ide-tape */
	IDE_AFLAG_IGNORE_DSC = (1 << 18),
	/* 0 When the tape position is unknown */
	IDE_AFLAG_ADDRESS_VALID = (1 << 19),
	/* Device already opened */
	IDE_AFLAG_BUSY = (1 << 20),
	/* Attempt to auto-detect the current user block size */
	IDE_AFLAG_DETECT_BS = (1 << 21),
	/* Currently on a filemark */
	IDE_AFLAG_FILEMARK = (1 << 22),
	/* 0 = no tape is loaded, so we don't rewind after ejecting */
	IDE_AFLAG_MEDIUM_PRESENT = (1 << 23),

	IDE_AFLAG_NO_AUTOCLOSE = (1 << 24),
};

/* device flags */
enum {
	/* restore settings after device reset */
	IDE_DFLAG_KEEP_SETTINGS = (1 << 0),
	/* device is using DMA for read/write */
	IDE_DFLAG_USING_DMA = (1 << 1),
	/* okay to unmask other IRQs */
	IDE_DFLAG_UNMASK = (1 << 2),
	/* don't attempt flushes */
	IDE_DFLAG_NOFLUSH = (1 << 3),
	/* DSC overlap */
	IDE_DFLAG_DSC_OVERLAP = (1 << 4),
	/* give potential excess bandwidth */
	IDE_DFLAG_NICE1 = (1 << 5),
	/* device is physically present */
	IDE_DFLAG_PRESENT = (1 << 6),
	/* device ejected hint */
	IDE_DFLAG_DEAD = (1 << 7),
	/* id read from device (synthetic if not set) */
	IDE_DFLAG_ID_READ = (1 << 8),
	IDE_DFLAG_NOPROBE = (1 << 9),
	/* need to do check_media_change() */
	IDE_DFLAG_REMOVABLE = (1 << 10),
	/* needed for removable devices */
	IDE_DFLAG_ATTACH = (1 << 11),
	IDE_DFLAG_FORCED_GEOM = (1 << 12),
	/* disallow setting unmask bit */
	IDE_DFLAG_NO_UNMASK = (1 << 13),
	/* disallow enabling 32-bit I/O */
	IDE_DFLAG_NO_IO_32BIT = (1 << 14),
	/* for removable only: door lock/unlock works */
	IDE_DFLAG_DOORLOCKING = (1 << 15),
	/* disallow DMA */
	IDE_DFLAG_NODMA = (1 << 16),
	/* powermanagment told us not to do anything, so sleep nicely */
	IDE_DFLAG_BLOCKED = (1 << 17),
	/* sleeping & sleep field valid */
	IDE_DFLAG_SLEEPING = (1 << 18),
	IDE_DFLAG_POST_RESET = (1 << 19),
	IDE_DFLAG_UDMA33_WARNED = (1 << 20),
	IDE_DFLAG_LBA48 = (1 << 21),
	/* status of write cache */
	IDE_DFLAG_WCACHE = (1 << 22),
	/* used for ignoring ATA_DF */
	IDE_DFLAG_NOWERR = (1 << 23),
	/* retrying in PIO */
	IDE_DFLAG_DMA_PIO_RETRY = (1 << 24),
	IDE_DFLAG_LBA = (1 << 25),
	/* don't unload heads */
	IDE_DFLAG_NO_UNLOAD = (1 << 26),
	/* heads unloaded, please don't reset port */
	IDE_DFLAG_PARKED = (1 << 27),
	IDE_DFLAG_MEDIA_CHANGED = (1 << 28),
	/* write protect */
	IDE_DFLAG_WP = (1 << 29),
	IDE_DFLAG_FORMAT_IN_PROGRESS = (1 << 30),
};

struct ide_drive_s {
	char name[4];		/* drive name, such as "hda" */
	char driver_req[10];	/* requests specific driver */

	struct request_queue *queue;	/* request queue */

	struct request *rq;	/* current request */
	void *driver_data;	/* extra driver data */
	u16 *id;		/* identification info */
#ifdef CONFIG_IDE_PROC_FS
	struct proc_dir_entry *proc;	/* /proc/ide/ directory entry */
	const struct ide_proc_devset *settings;	/* /proc/ide/ drive settings */
#endif
	struct hwif_s *hwif;	/* actually (ide_hwif_t *) */

	const struct ide_disk_ops *disk_ops;

	unsigned long dev_flags;

	unsigned long sleep;	/* sleep until this time */
	unsigned long timeout;	/* max time to wait for irq */

	special_t special;	/* special action flags */

	u8 select;		/* basic drive/head select reg value */
	u8 retry_pio;		/* retrying dma capable host in pio */
	u8 waiting_for_dma;	/* dma currently in progress */
	u8 dma;			/* atapi dma flag */

	u8 quirk_list;		/* considered quirky, set for a specific host */
	u8 init_speed;		/* transfer rate set at boot */
	u8 current_speed;	/* current transfer rate set */
	u8 desired_speed;	/* desired transfer rate set */
	u8 dn;			/* now wide spread use */
	u8 acoustic;		/* acoustic management */
	u8 media;		/* disk, cdrom, tape, floppy, ... */
	u8 ready_stat;		/* min status value for drive ready */
	u8 mult_count;		/* current multiple sector setting */
	u8 mult_req;		/* requested multiple sector setting */
	u8 io_32bit;		/* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
	u8 bad_wstat;		/* used for ignoring ATA_DF */
	u8 head;		/* "real" number of heads */
	u8 sect;		/* "real" sectors per track */
	u8 bios_head;		/* BIOS/fdisk/LILO number of heads */
	u8 bios_sect;		/* BIOS/fdisk/LILO sectors per track */

	/* delay this long before sending packet command */
	u8 pc_delay;

	unsigned int bios_cyl;	/* BIOS/fdisk/LILO number of cyls */
	unsigned int cyl;	/* "real" number of cyls */
	unsigned int drive_data;	/* used by set_pio_mode/selectproc */
	unsigned int failures;	/* current failure count */
	unsigned int max_failures;	/* maximum allowed failure count */
	u64 probed_capacity;	/* initial reported media capacity (ide-cd only currently) */

	u64 capacity64;		/* total number of sectors */

	int lun;		/* logical unit */
	int crc_count;		/* crc counter to reduce drive speed */

	unsigned long debug_mask;	/* debugging levels switch */

#ifdef CONFIG_BLK_DEV_IDEACPI
	struct ide_acpi_drive_link *acpidata;
#endif
	struct list_head list;
	struct device gendev;
	struct completion gendev_rel_comp;	/* to deal with device release() */

	/* current packet command */
	struct ide_atapi_pc *pc;

	/* callback for packet commands */
	void (*pc_callback) (struct ide_drive_s *, int);

	void (*pc_update_buffers) (struct ide_drive_s *, struct ide_atapi_pc *);
	int (*pc_io_buffers) (struct ide_drive_s *, struct ide_atapi_pc *,
			      unsigned int, int);

	 ide_startstop_t(*irq_handler) (struct ide_drive_s *);

	unsigned long atapi_flags;

	struct ide_atapi_pc request_sense_pc;
	struct request request_sense_rq;
};

typedef struct ide_drive_s ide_drive_t;

#define to_ide_device(dev)		container_of(dev, ide_drive_t, gendev)

#define to_ide_drv(obj, cont_type)	\
	container_of(obj, struct cont_type, dev)

#define ide_drv_g(disk, cont_type)	\
	container_of((disk)->private_data, struct cont_type, driver)

struct ide_port_info;

struct ide_tp_ops {
	void (*exec_command) (struct hwif_s *, u8);
	 u8(*read_status) (struct hwif_s *);
	 u8(*read_altstatus) (struct hwif_s *);

	void (*set_irq) (struct hwif_s *, int);

	void (*tf_load) (ide_drive_t *, struct ide_task_s *);
	void (*tf_read) (ide_drive_t *, struct ide_task_s *);

	void (*input_data) (ide_drive_t *, struct request *, void *,
			    unsigned int);
	void (*output_data) (ide_drive_t *, struct request *, void *,
			     unsigned int);
};

extern const struct ide_tp_ops default_tp_ops;

/**
 * struct ide_port_ops - IDE port operations
 *
 * @init_dev:		host specific initialization of a device
 * @set_pio_mode:	routine to program host for PIO mode
 * @set_dma_mode:	routine to program host for DMA mode
 * @selectproc:		tweaks hardware to select drive
 * @reset_poll:		chipset polling based on hba specifics
 * @pre_reset:		chipset specific changes to default for device-hba resets
 * @resetproc:		routine to reset controller after a disk reset
 * @maskproc:		special host masking for drive selection
 * @quirkproc:		check host's drive quirk list
 * @clear_irq:		clear IRQ
 *
 * @mdma_filter:	filter MDMA modes
 * @udma_filter:	filter UDMA modes
 *
 * @cable_detect:	detect cable type
 */
struct ide_port_ops {
	void (*init_dev) (ide_drive_t *);
	void (*set_pio_mode) (ide_drive_t *, const u8);
	void (*set_dma_mode) (ide_drive_t *, const u8);
	void (*selectproc) (ide_drive_t *);
	int (*reset_poll) (ide_drive_t *);
	void (*pre_reset) (ide_drive_t *);
	void (*resetproc) (ide_drive_t *);
	void (*maskproc) (ide_drive_t *, int);
	void (*quirkproc) (ide_drive_t *);
	void (*clear_irq) (ide_drive_t *);

	 u8(*mdma_filter) (ide_drive_t *);
	 u8(*udma_filter) (ide_drive_t *);

	 u8(*cable_detect) (struct hwif_s *);
};

struct ide_dma_ops {
	void (*dma_host_set) (struct ide_drive_s *, int);
	int (*dma_setup) (struct ide_drive_s *);
	void (*dma_exec_cmd) (struct ide_drive_s *, u8);
	void (*dma_start) (struct ide_drive_s *);
	int (*dma_end) (struct ide_drive_s *);
	int (*dma_test_irq) (struct ide_drive_s *);
	void (*dma_lost_irq) (struct ide_drive_s *);
	void (*dma_timeout) (struct ide_drive_s *);
	/*
	 * The following method is optional and only required to be
	 * implemented for the SFF-8038i compatible controllers.
	 */
	 u8(*dma_sff_read_status) (struct hwif_s *);
};

struct ide_host;

typedef struct hwif_s {
	struct hwif_s *mate;	/* other hwif from same PCI chip */
	struct proc_dir_entry *proc;	/* /proc/ide/ directory entry */

	struct ide_host *host;

	char name[6];		/* name of interface, eg. "ide0" */

	struct ide_io_ports io_ports;

	unsigned long sata_scr[SATA_NR_PORTS];

	ide_drive_t *devices[MAX_DRIVES + 1];

	u8 major;		/* our major number */
	u8 index;		/* 0 for ide0; 1 for ide1; ... */
	u8 channel;		/* for dual-port chips: 0=primary, 1=secondary */

	u32 host_flags;

	u8 pio_mask;

	u8 ultra_mask;
	u8 mwdma_mask;
	u8 swdma_mask;

	u8 cbl;			/* cable type */

	hwif_chipset_t chipset;	/* sub-module for tuning.. */

	struct device *dev;

	ide_ack_intr_t *ack_intr;

	void (*rw_disk) (ide_drive_t *, struct request *);

	const struct ide_tp_ops *tp_ops;
	const struct ide_port_ops *port_ops;
	const struct ide_dma_ops *dma_ops;

	/* dma physical region descriptor table (cpu view) */
	unsigned int *dmatable_cpu;
	/* dma physical region descriptor table (dma view) */
	dma_addr_t dmatable_dma;

	/* maximum number of PRD table entries */
	int prd_max_nents;
	/* PRD entry size in bytes */
	int prd_ent_size;

	/* Scatter-gather list used to build the above */
	struct scatterlist *sg_table;
	int sg_max_nents;	/* Maximum number of entries in it */
	int sg_nents;		/* Current number of entries in it */
	int orig_sg_nents;
	int sg_dma_direction;	/* dma transfer direction */

	/* data phase of the active command (currently only valid for PIO/DMA) */
	int data_phase;

	struct ide_task_s task;	/* current command */

	unsigned int nsect;
	unsigned int nleft;
	struct scatterlist *cursg;
	unsigned int cursg_ofs;

	int rqsize;		/* max sectors per request */
	int irq;		/* our irq number */

	unsigned long dma_base;	/* base addr for dma ports */

	unsigned long config_data;	/* for use by chipset-specific code */
	unsigned long select_data;	/* for use by chipset-specific code */

	unsigned long extra_base;	/* extra addr for dma ports */
	unsigned extra_ports;	/* number of extra dma ports */

	unsigned present:1;	/* this interface exists */
	unsigned busy:1;	/* serializes devices on a port */

	struct device gendev;
	struct device *portdev;

	struct completion gendev_rel_comp;	/* To deal with device release() */

	void *hwif_data;	/* extra hwif data */

#ifdef CONFIG_BLK_DEV_IDEACPI
	struct ide_acpi_hwif_link *acpidata;
#endif

	/* IRQ handler, if active */
	 ide_startstop_t(*handler) (ide_drive_t *);

	/* BOOL: polling active & poll_timeout field valid */
	unsigned int polling:1;

	/* current drive */
	ide_drive_t *cur_dev;

	/* current request */
	struct request *rq;

	/* failsafe timer */
	struct timer_list timer;
	/* timeout value during long polls */
	unsigned long poll_timeout;
	/* queried upon timeouts */
	int (*expiry) (ide_drive_t *);

	int req_gen;
	int req_gen_timer;

	spinlock_t lock;
} ____cacheline_internodealigned_in_smp ide_hwif_t;

#define MAX_HOST_PORTS 4

struct ide_host {
	ide_hwif_t *ports[MAX_HOST_PORTS + 1];
	unsigned int n_ports;
	struct device *dev[2];
	unsigned int (*init_chipset) (struct pci_dev *);
	irq_handler_t irq_handler;
	unsigned long host_flags;
	void *host_priv;
	ide_hwif_t *cur_port;	/* for hosts requiring serialization */

	/* used for hosts requiring serialization */
	volatile unsigned long host_busy;
};

#define IDE_HOST_BUSY 0

/*
 *  internal ide interrupt handler type
 */
typedef ide_startstop_t(ide_handler_t) (ide_drive_t *);
typedef int (ide_expiry_t) (ide_drive_t *);

/* used by ide-cd, ide-floppy, etc. */
typedef void (xfer_func_t) (ide_drive_t *, struct request * rq, void *,
			    unsigned);

extern struct mutex ide_setting_mtx;

/*
 * configurable drive settings
 */

#define DS_SYNC	(1 << 0)

struct ide_devset {
	int (*get) (ide_drive_t *);
	int (*set) (ide_drive_t *, int);
	unsigned int flags;
};

#define __DEVSET(_flags, _get, _set) { \
	.flags	= _flags, \
	.get	= _get,	\
	.set	= _set,	\
}

#define ide_devset_get(name, field) \
static int get_##name(ide_drive_t *drive) \
{ \
	return drive->field; \
}

#define ide_devset_set(name, field) \
static int set_##name(ide_drive_t *drive, int arg) \
{ \
	drive->field = arg; \
	return 0; \
}

#define ide_devset_get_flag(name, flag) \
static int get_##name(ide_drive_t *drive) \
{ \
	return !!(drive->dev_flags & flag); \
}

#define ide_devset_set_flag(name, flag) \
static int set_##name(ide_drive_t *drive, int arg) \
{ \
	if (arg) \
		drive->dev_flags |= flag; \
	else \
		drive->dev_flags &= ~flag; \
	return 0; \
}

#define __IDE_DEVSET(_name, _flags, _get, _set) \
const struct ide_devset ide_devset_##_name = \
	__DEVSET(_flags, _get, _set)

#define IDE_DEVSET(_name, _flags, _get, _set) \
static __IDE_DEVSET(_name, _flags, _get, _set)

#define ide_devset_rw(_name, _func) \
IDE_DEVSET(_name, 0, get_##_func, set_##_func)

#define ide_devset_w(_name, _func) \
IDE_DEVSET(_name, 0, NULL, set_##_func)

#define ide_ext_devset_rw(_name, _func) \
__IDE_DEVSET(_name, 0, get_##_func, set_##_func)

#define ide_ext_devset_rw_sync(_name, _func) \
__IDE_DEVSET(_name, DS_SYNC, get_##_func, set_##_func)

#define ide_decl_devset(_name) \
extern const struct ide_devset ide_devset_##_name

ide_decl_devset(io_32bit);
ide_decl_devset(keepsettings);
ide_decl_devset(pio_mode);
ide_decl_devset(unmaskirq);
ide_decl_devset(using_dma);

#ifdef CONFIG_IDE_PROC_FS
/*
 * /proc/ide interface
 */

#define ide_devset_rw_field(_name, _field) \
ide_devset_get(_name, _field); \
ide_devset_set(_name, _field); \
IDE_DEVSET(_name, DS_SYNC, get_##_name, set_##_name)

#define ide_devset_rw_flag(_name, _field) \
ide_devset_get_flag(_name, _field); \
ide_devset_set_flag(_name, _field); \
IDE_DEVSET(_name, DS_SYNC, get_##_name, set_##_name)

struct ide_proc_devset {
	const char *name;
	const struct ide_devset *setting;
	int min, max;
	int (*mulf) (ide_drive_t *);
	int (*divf) (ide_drive_t *);
};

#define __IDE_PROC_DEVSET(_name, _min, _max, _mulf, _divf) { \
	.name = __stringify(_name), \
	.setting = &ide_devset_##_name, \
	.min = _min, \
	.max = _max, \
	.mulf = _mulf, \
	.divf = _divf, \
}

#define IDE_PROC_DEVSET(_name, _min, _max) \
__IDE_PROC_DEVSET(_name, _min, _max, NULL, NULL)

typedef struct {
	const char *name;
	mode_t mode;
	read_proc_t *read_proc;
	write_proc_t *write_proc;
} ide_proc_entry_t;

void proc_ide_create(void);
void proc_ide_destroy(void);
void ide_proc_register_port(ide_hwif_t *);
void ide_proc_port_register_devices(ide_hwif_t *);
void ide_proc_unregister_device(ide_drive_t *);
void ide_proc_unregister_port(ide_hwif_t *);
void ide_proc_register_driver(ide_drive_t *, struct ide_driver *);
void ide_proc_unregister_driver(ide_drive_t *, struct ide_driver *);

read_proc_t proc_ide_read_capacity;
read_proc_t proc_ide_read_geometry;

/*
 * Standard exit stuff:
 */
#define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
{					\
	len -= off;			\
	if (len < count) {		\
		*eof = 1;		\
		if (len <= 0)		\
			return 0;	\
	} else				\
		len = count;		\
	*start = page + off;		\
	return len;			\
}
#else
static inline void proc_ide_create(void)
{;
}

static inline void proc_ide_destroy(void)
{;
}

static inline void ide_proc_register_port(ide_hwif_t * hwif)
{;
}

static inline void ide_proc_port_register_devices(ide_hwif_t * hwif)
{;
}

static inline void ide_proc_unregister_device(ide_drive_t * drive)
{;
}

static inline void ide_proc_unregister_port(ide_hwif_t * hwif)
{;
}

static inline void ide_proc_register_driver(ide_drive_t * drive,
					    struct ide_driver *driver)
{;
}

static inline void ide_proc_unregister_driver(ide_drive_t * drive,
					      struct ide_driver *driver)
{;
}

#define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
#endif

enum {
	/* enter/exit functions */
	IDE_DBG_FUNC = (1 << 0),
	/* sense key/asc handling */
	IDE_DBG_SENSE = (1 << 1),
	/* packet commands handling */
	IDE_DBG_PC = (1 << 2),
	/* request handling */
	IDE_DBG_RQ = (1 << 3),
	/* driver probing/setup */
	IDE_DBG_PROBE = (1 << 4),
};

/* DRV_NAME has to be defined in the driver before using the macro below */
#define __ide_debug_log(lvl, fmt, args...)			\
{								\
	if (unlikely(drive->debug_mask & lvl))			\
		printk(KERN_INFO DRV_NAME ": " fmt, ## args);	\
}

/*
 * Power Management state machine (rq->pm->pm_step).
 *
 * For each step, the core calls ide_start_power_step() first.
 * This can return:
 *	- ide_stopped :	In this case, the core calls us back again unless
 *			step have been set to ide_power_state_completed.
 *	- ide_started :	In this case, the channel is left busy until an
 *			async event (interrupt) occurs.
 * Typically, ide_start_power_step() will issue a taskfile request with
 * do_rw_taskfile().
 *
 * Upon reception of the interrupt, the core will call ide_complete_power_step()
 * with the error code if any. This routine should update the step value
 * and return. It should not start a new request. The core will call
 * ide_start_power_step() for the new step value, unless step have been
 * set to IDE_PM_COMPLETED.
 */
enum {
	IDE_PM_START_SUSPEND,
	IDE_PM_FLUSH_CACHE = IDE_PM_START_SUSPEND,
	IDE_PM_STANDBY,

	IDE_PM_START_RESUME,
	IDE_PM_RESTORE_PIO = IDE_PM_START_RESUME,
	IDE_PM_IDLE,
	IDE_PM_RESTORE_DMA,

	IDE_PM_COMPLETED,
};

int generic_ide_suspend(struct device *, pm_message_t);
int generic_ide_resume(struct device *);

void ide_complete_power_step(ide_drive_t *, struct request *);
ide_startstop_t ide_start_power_step(ide_drive_t *, struct request *);
void ide_complete_pm_request(ide_drive_t *, struct request *);
void ide_check_pm_state(ide_drive_t *, struct request *);

/*
 * Subdrivers support.
 *
 * The gendriver.owner field should be set to the module owner of this driver.
 * The gendriver.name field should be set to the name of this driver
 */
struct ide_driver {
	const char *version;
	 ide_startstop_t(*do_request) (ide_drive_t *, struct request *,
				       sector_t);
	int (*end_request) (ide_drive_t *, int, int);
	struct device_driver gen_driver;
	int (*probe) (ide_drive_t *);
	void (*remove) (ide_drive_t *);
	void (*resume) (ide_drive_t *);
	void (*shutdown) (ide_drive_t *);
#ifdef CONFIG_IDE_PROC_FS
	ide_proc_entry_t *(*proc_entries) (ide_drive_t *);
	const struct ide_proc_devset *(*proc_devsets) (ide_drive_t *);
#endif
};

#define to_ide_driver(drv) container_of(drv, struct ide_driver, gen_driver)

int ide_device_get(ide_drive_t *);
void ide_device_put(ide_drive_t *);

struct ide_ioctl_devset {
	unsigned int get_ioctl;
	unsigned int set_ioctl;
	const struct ide_devset *setting;
};

int ide_setting_ioctl(ide_drive_t *, struct block_device *, unsigned int,
		      unsigned long, const struct ide_ioctl_devset *);

int generic_ide_ioctl(ide_drive_t *, struct block_device *, unsigned,
		      unsigned long);

extern int ide_vlb_clk;
extern int ide_pci_clk;

extern int ide_end_request(ide_drive_t * drive, int uptodate, int nrsecs);
int ide_end_dequeued_request(ide_drive_t * drive, struct request *rq,
			     int uptodate, int nr_sectors);

extern void ide_set_handler(ide_drive_t * drive, ide_handler_t * handler,
			    unsigned int timeout, ide_expiry_t * expiry);

void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int,
			 ide_expiry_t *);

void ide_execute_pkt_cmd(ide_drive_t *);

void ide_pad_transfer(ide_drive_t *, int, int);

ide_startstop_t ide_error(ide_drive_t *, const char *, u8);

void ide_fix_driveid(u16 *);

extern void ide_fixstring(u8 *, const int, const int);

int ide_busy_sleep(ide_hwif_t *, unsigned long, int);

int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);

extern ide_startstop_t ide_do_reset(ide_drive_t *);

extern int ide_devset_execute(ide_drive_t * drive,
			      const struct ide_devset *setting, int arg);

extern void ide_do_drive_cmd(ide_drive_t *, struct request *);

extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);

void ide_tf_dump(const char *, struct ide_taskfile *);

void ide_exec_command(ide_hwif_t *, u8);
u8 ide_read_status(ide_hwif_t *);
u8 ide_read_altstatus(ide_hwif_t *);

void ide_set_irq(ide_hwif_t *, int);

void ide_tf_load(ide_drive_t *, ide_task_t *);
void ide_tf_read(ide_drive_t *, ide_task_t *);

void ide_input_data(ide_drive_t *, struct request *, void *, unsigned int);
void ide_output_data(ide_drive_t *, struct request *, void *, unsigned int);

int ide_io_buffers(ide_drive_t *, struct ide_atapi_pc *, unsigned int, int);

extern void SELECT_DRIVE(ide_drive_t *);
void SELECT_MASK(ide_drive_t *, int);

u8 ide_read_error(ide_drive_t *);
void ide_read_bcount_and_ireason(ide_drive_t *, u16 *, u8 *);

extern int drive_is_ready(ide_drive_t *);

void ide_pktcmd_tf_load(ide_drive_t *, u32, u16, u8);

int ide_check_atapi_device(ide_drive_t *, const char *);

void ide_init_pc(struct ide_atapi_pc *);

/* Disk head parking */
extern wait_queue_head_t ide_park_wq;
ssize_t ide_park_show(struct device *dev, struct device_attribute *attr,
		      char *buf);
ssize_t ide_park_store(struct device *dev, struct device_attribute *attr,
		       const char *buf, size_t len);

/*
 * Special requests for ide-tape block device strategy routine.
 *
 * In order to service a character device command, we add special requests to
 * the tail of our block device request queue and wait for their completion.
 */
enum {
	REQ_IDETAPE_PC1 = (1 << 0),	/* packet command (first stage) */
	REQ_IDETAPE_PC2 = (1 << 1),	/* packet command (second stage) */
	REQ_IDETAPE_READ = (1 << 2),
	REQ_IDETAPE_WRITE = (1 << 3),
};

int ide_queue_pc_tail(ide_drive_t *, struct gendisk *, struct ide_atapi_pc *);

int ide_do_test_unit_ready(ide_drive_t *, struct gendisk *);
int ide_do_start_stop(ide_drive_t *, struct gendisk *, int);
int ide_set_media_lock(ide_drive_t *, struct gendisk *, int);
void ide_create_request_sense_cmd(ide_drive_t *, struct ide_atapi_pc *);
void ide_retry_pc(ide_drive_t *, struct gendisk *);

int ide_cd_expiry(ide_drive_t *);

int ide_cd_get_xferlen(struct request *);

ide_startstop_t ide_issue_pc(ide_drive_t *);

ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);

void task_end_request(ide_drive_t *, struct request *, u8);

int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *, u16);
int ide_no_data_taskfile(ide_drive_t *, ide_task_t *);

int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);

extern int ide_driveid_update(ide_drive_t *);
extern int ide_config_drive_speed(ide_drive_t *, u8);
extern u8 eighty_ninty_three(ide_drive_t *);
extern int taskfile_lib_get_identify(ide_drive_t * drive, u8 *);

extern int ide_wait_not_busy(ide_hwif_t * hwif, unsigned long timeout);

extern void ide_stall_queue(ide_drive_t * drive, unsigned long timeout);

extern void ide_timer_expiry(unsigned long);
extern irqreturn_t ide_intr(int irq, void *dev_id);
extern void do_ide_request(struct request_queue *);

void ide_init_disk(struct gendisk *, ide_drive_t *);

#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
extern int __ide_pci_register_driver(struct pci_driver *driver,
				     struct module *owner,
				     const char *mod_name);
#define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
#else
#define ide_pci_register_driver(d) pci_register_driver(d)
#endif

static inline int ide_pci_is_in_compatibility_mode(struct pci_dev *dev)
{
	if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE && (dev->class & 5) != 5)
		return 1;
	return 0;
}

void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *, int,
			 hw_regs_t *, hw_regs_t **);
void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);

#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
int ide_pci_set_master(struct pci_dev *, const char *);
unsigned long ide_pci_dma_base(ide_hwif_t *, const struct ide_port_info *);
int ide_pci_check_simplex(ide_hwif_t *, const struct ide_port_info *);
int ide_hwif_setup_dma(ide_hwif_t *, const struct ide_port_info *);
#else
static inline int ide_hwif_setup_dma(ide_hwif_t * hwif,
				     const struct ide_port_info *d)
{
	return -EINVAL;
}
#endif

struct ide_pci_enablebit {
	u8 reg;			/* byte pci reg holding the enable-bit */
	u8 mask;		/* mask to isolate the enable-bit */
	u8 val;			/* value of masked reg when "enabled" */
};

enum {
	/* Uses ISA control ports not PCI ones. */
	IDE_HFLAG_ISA_PORTS = (1 << 0),
	/* single port device */
	IDE_HFLAG_SINGLE = (1 << 1),
	/* don't use legacy PIO blacklist */
	IDE_HFLAG_PIO_NO_BLACKLIST = (1 << 2),
	/* set for the second port of QD65xx */
	IDE_HFLAG_QD_2ND_PORT = (1 << 3),
	/* use PIO8/9 for prefetch off/on */
	IDE_HFLAG_ABUSE_PREFETCH = (1 << 4),
	/* use PIO6/7 for fast-devsel off/on */
	IDE_HFLAG_ABUSE_FAST_DEVSEL = (1 << 5),
	/* use 100-102 and 200-202 PIO values to set DMA modes */
	IDE_HFLAG_ABUSE_DMA_MODES = (1 << 6),
	/*
	 * keep DMA setting when programming PIO mode, may be used only
	 * for hosts which have separate PIO and DMA timings (ie. PMAC)
	 */
	IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7),
	/* program host for the transfer mode after programming device */
	IDE_HFLAG_POST_SET_MODE = (1 << 8),
	/* don't program host/device for the transfer mode ("smart" hosts) */
	IDE_HFLAG_NO_SET_MODE = (1 << 9),
	/* trust BIOS for programming chipset/device for DMA */
	IDE_HFLAG_TRUST_BIOS_FOR_DMA = (1 << 10),
	/* host is CS5510/CS5520 */
	IDE_HFLAG_CS5520 = (1 << 11),
	/* ATAPI DMA is unsupported */
	IDE_HFLAG_NO_ATAPI_DMA = (1 << 12),
	/* set if host is a "non-bootable" controller */
	IDE_HFLAG_NON_BOOTABLE = (1 << 13),
	/* host doesn't support DMA */
	IDE_HFLAG_NO_DMA = (1 << 14),
	/* check if host is PCI IDE device before allowing DMA */
	IDE_HFLAG_NO_AUTODMA = (1 << 15),
	/* host uses MMIO */
	IDE_HFLAG_MMIO = (1 << 16),
	/* no LBA48 */
	IDE_HFLAG_NO_LBA48 = (1 << 17),
	/* no LBA48 DMA */
	IDE_HFLAG_NO_LBA48_DMA = (1 << 18),
	/* data FIFO is cleared by an error */
	IDE_HFLAG_ERROR_STOPS_FIFO = (1 << 19),
	/* serialize ports */
	IDE_HFLAG_SERIALIZE = (1 << 20),
	/* use legacy IRQs */
	IDE_HFLAG_LEGACY_IRQS = (1 << 21),
	/* force use of legacy IRQs */
	IDE_HFLAG_FORCE_LEGACY_IRQS = (1 << 22),
	/* host is TRM290 */
	IDE_HFLAG_TRM290 = (1 << 23),
	/* use 32-bit I/O ops */
	IDE_HFLAG_IO_32BIT = (1 << 24),
	/* unmask IRQs */
	IDE_HFLAG_UNMASK_IRQS = (1 << 25),
	IDE_HFLAG_BROKEN_ALTSTATUS = (1 << 26),
	/* serialize ports if DMA is possible (for sl82c105) */
	IDE_HFLAG_SERIALIZE_DMA = (1 << 27),
	/* force host out of "simplex" mode */
	IDE_HFLAG_CLEAR_SIMPLEX = (1 << 28),
	/* DSC overlap is unsupported */
	IDE_HFLAG_NO_DSC = (1 << 29),
	/* never use 32-bit I/O ops */
	IDE_HFLAG_NO_IO_32BIT = (1 << 30),
	/* never unmask IRQs */
	IDE_HFLAG_NO_UNMASK_IRQS = (1 << 31),
};

#ifdef CONFIG_BLK_DEV_OFFBOARD
#define IDE_HFLAG_OFF_BOARD	0
#else
#define IDE_HFLAG_OFF_BOARD	IDE_HFLAG_NON_BOOTABLE
#endif

struct ide_port_info {
	char *name;
	unsigned int (*init_chipset) (struct pci_dev *);
	void (*init_iops) (ide_hwif_t *);
	void (*init_hwif) (ide_hwif_t *);
	int (*init_dma) (ide_hwif_t *, const struct ide_port_info *);

	const struct ide_tp_ops *tp_ops;
	const struct ide_port_ops *port_ops;
	const struct ide_dma_ops *dma_ops;

	struct ide_pci_enablebit enablebits[2];

	hwif_chipset_t chipset;

	u16 max_sectors;	/* if < than the default one */

	u32 host_flags;
	u8 pio_mask;
	u8 swdma_mask;
	u8 mwdma_mask;
	u8 udma_mask;
};

int ide_pci_init_one(struct pci_dev *, const struct ide_port_info *, void *);
int ide_pci_init_two(struct pci_dev *, struct pci_dev *,
		     const struct ide_port_info *, void *);
void ide_pci_remove(struct pci_dev *);

#ifdef CONFIG_PM
int ide_pci_suspend(struct pci_dev *, pm_message_t);
int ide_pci_resume(struct pci_dev *);
#else
#define ide_pci_suspend NULL
#define ide_pci_resume NULL
#endif

void ide_map_sg(ide_drive_t *, struct request *);
void ide_init_sg_cmd(ide_drive_t *, struct request *);

#define BAD_DMA_DRIVE		0
#define GOOD_DMA_DRIVE		1

struct drive_list_entry {
	const char *id_model;
	const char *id_firmware;
};

int ide_in_drive_list(u16 *, const struct drive_list_entry *);

#ifdef CONFIG_BLK_DEV_IDEDMA
int ide_dma_good_drive(ide_drive_t *);
int __ide_dma_bad_drive(ide_drive_t *);
int ide_id_dma_bug(ide_drive_t *);

u8 ide_find_dma_mode(ide_drive_t *, u8);

static inline u8 ide_max_dma_mode(ide_drive_t * drive)
{
	return ide_find_dma_mode(drive, XFER_UDMA_6);
}

void ide_dma_off_quietly(ide_drive_t *);
void ide_dma_off(ide_drive_t *);
void ide_dma_on(ide_drive_t *);
int ide_set_dma(ide_drive_t *);
void ide_check_dma_crc(ide_drive_t *);
ide_startstop_t ide_dma_intr(ide_drive_t *);

int ide_allocate_dma_engine(ide_hwif_t *);
void ide_release_dma_engine(ide_hwif_t *);

int ide_build_sglist(ide_drive_t *, struct request *);
void ide_destroy_dmatable(ide_drive_t *);

#ifdef CONFIG_BLK_DEV_IDEDMA_SFF
int config_drive_for_dma(ide_drive_t *);
extern int ide_build_dmatable(ide_drive_t *, struct request *);
void ide_dma_host_set(ide_drive_t *, int);
extern int ide_dma_setup(ide_drive_t *);
void ide_dma_exec_cmd(ide_drive_t *, u8);
extern void ide_dma_start(ide_drive_t *);
int ide_dma_end(ide_drive_t *);
int ide_dma_test_irq(ide_drive_t *);
u8 ide_dma_sff_read_status(ide_hwif_t *);
extern const struct ide_dma_ops sff_dma_ops;
#else
static inline int config_drive_for_dma(ide_drive_t * drive)
{
	return 0;
}
#endif /* CONFIG_BLK_DEV_IDEDMA_SFF */

void ide_dma_lost_irq(ide_drive_t *);
void ide_dma_timeout(ide_drive_t *);

#else
static inline int ide_id_dma_bug(ide_drive_t * drive)
{
	return 0;
}

static inline u8 ide_find_dma_mode(ide_drive_t * drive, u8 speed)
{
	return 0;
}

static inline u8 ide_max_dma_mode(ide_drive_t * drive)
{
	return 0;
}

static inline void ide_dma_off_quietly(ide_drive_t * drive)
{;
}

static inline void ide_dma_off(ide_drive_t * drive)
{;
}

static inline void ide_dma_on(ide_drive_t * drive)
{;
}

static inline void ide_dma_verbose(ide_drive_t * drive)
{;
}

static inline int ide_set_dma(ide_drive_t * drive)
{
	return 1;
}

static inline void ide_check_dma_crc(ide_drive_t * drive)
{;
}

static inline void ide_release_dma_engine(ide_hwif_t * hwif)
{;
}
#endif /* CONFIG_BLK_DEV_IDEDMA */

#ifdef CONFIG_BLK_DEV_IDEACPI
extern int ide_acpi_exec_tfs(ide_drive_t * drive);
extern void ide_acpi_get_timing(ide_hwif_t * hwif);
extern void ide_acpi_push_timing(ide_hwif_t * hwif);
extern void ide_acpi_init(ide_hwif_t * hwif);
void ide_acpi_port_init_devices(ide_hwif_t *);
extern void ide_acpi_set_state(ide_hwif_t * hwif, int on);
#else
static inline int ide_acpi_exec_tfs(ide_drive_t * drive)
{
	return 0;
}

static inline void ide_acpi_get_timing(ide_hwif_t * hwif)
{;
}

static inline void ide_acpi_push_timing(ide_hwif_t * hwif)
{;
}

static inline void ide_acpi_init(ide_hwif_t * hwif)
{;
}

static inline void ide_acpi_port_init_devices(ide_hwif_t * hwif)
{;
}

static inline void ide_acpi_set_state(ide_hwif_t * hwif, int on)
{
}
#endif

void ide_register_region(struct gendisk *);
void ide_unregister_region(struct gendisk *);

void ide_undecoded_slave(ide_drive_t *);

void ide_port_apply_params(ide_hwif_t *);
int ide_sysfs_register_port(ide_hwif_t *);

struct ide_host *ide_host_alloc(const struct ide_port_info *, hw_regs_t **);
void ide_host_free(struct ide_host *);
int ide_host_register(struct ide_host *, const struct ide_port_info *,
		      hw_regs_t **);
int ide_host_add(const struct ide_port_info *, hw_regs_t **,
		 struct ide_host **);
void ide_host_remove(struct ide_host *);
int ide_legacy_device_add(const struct ide_port_info *, unsigned long);
void ide_port_unregister_devices(ide_hwif_t *);
void ide_port_scan(ide_hwif_t *);

static inline void *ide_get_hwifdata(ide_hwif_t * hwif)
{
	return hwif->hwif_data;
}

static inline void ide_set_hwifdata(ide_hwif_t * hwif, void *data)
{
	hwif->hwif_data = data;
}

const char *ide_xfer_verbose(u8 mode);
extern void ide_toggle_bounce(ide_drive_t * drive, int on);
extern int ide_set_xfer_rate(ide_drive_t * drive, u8 rate);

u64 ide_get_lba_addr(struct ide_taskfile *, int);
u8 ide_dump_status(ide_drive_t *, const char *, u8);

struct ide_timing {
	u8 mode;
	u8 setup;		/* t1 */
	u16 act8b;		/* t2 for 8-bit io */
	u16 rec8b;		/* t2i for 8-bit io */
	u16 cyc8b;		/* t0 for 8-bit io */
	u16 active;		/* t2 or tD */
	u16 recover;		/* t2i or tK */
	u16 cycle;		/* t0 */
	u16 udma;		/* t2CYCTYP/2 */
};

enum {
	IDE_TIMING_SETUP = (1 << 0),
	IDE_TIMING_ACT8B = (1 << 1),
	IDE_TIMING_REC8B = (1 << 2),
	IDE_TIMING_CYC8B = (1 << 3),
	IDE_TIMING_8BIT = IDE_TIMING_ACT8B | IDE_TIMING_REC8B |
	    IDE_TIMING_CYC8B,
	IDE_TIMING_ACTIVE = (1 << 4),
	IDE_TIMING_RECOVER = (1 << 5),
	IDE_TIMING_CYCLE = (1 << 6),
	IDE_TIMING_UDMA = (1 << 7),
	IDE_TIMING_ALL = IDE_TIMING_SETUP | IDE_TIMING_8BIT |
	    IDE_TIMING_ACTIVE | IDE_TIMING_RECOVER |
	    IDE_TIMING_CYCLE | IDE_TIMING_UDMA,
};

struct ide_timing *ide_timing_find_mode(u8);
u16 ide_pio_cycle_time(ide_drive_t *, u8);
void ide_timing_merge(struct ide_timing *, struct ide_timing *,
		      struct ide_timing *, unsigned int);
int ide_timing_compute(ide_drive_t *, u8, struct ide_timing *, int, int);

int ide_scan_pio_blacklist(char *);

u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);

int ide_set_pio_mode(ide_drive_t *, u8);
int ide_set_dma_mode(ide_drive_t *, u8);

void ide_set_pio(ide_drive_t *, u8);

static inline void ide_set_max_pio(ide_drive_t * drive)
{
	ide_set_pio(drive, 255);
}

char *ide_media_string(ide_drive_t *);

extern struct device_attribute ide_dev_attrs[];
extern struct bus_type ide_bus_type;
extern struct class *ide_port_class;

static inline void ide_dump_identify(u8 * id)
{
	print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 2, id, 512, 0);
}

static inline int hwif_to_node(ide_hwif_t * hwif)
{
	return hwif->dev ? dev_to_node(hwif->dev) : -1;
}

static inline ide_drive_t *ide_get_pair_dev(ide_drive_t * drive)
{
	ide_drive_t *peer = drive->hwif->devices[(drive->dn ^ 1) & 1];

	return (peer->dev_flags & IDE_DFLAG_PRESENT) ? peer : NULL;
}

#define ide_port_for_each_dev(i, dev, port) \
	for ((i) = 0; ((dev) = (port)->devices[i]) || (i) < MAX_DRIVES; (i)++)

#define ide_host_for_each_port(i, port, host) \
	for ((i) = 0; ((port) = (host)->ports[i]) || (i) < MAX_HOST_PORTS; (i)++)

#endif /* _IDE_H */
